Question: Which is the institute of the Russian Academy of Sciences that has Russian as a regulatory language?
Paraphrase: Which of the Russian Academy of Sciences institutes uses Russian as its regulatory language?
SPARQL (Wikidata):  select distinct ?obj where { wd:Q7737 wdt:P1018 ?obj . ?obj wdt:P31 wd:Q4201890 } 
Answer: Russian Language Institute